Center for Environmental Research Information (U.S.), United States. Environmental Protection Agency. Office of Drinking Water, & Pettyjohn, W. A. (1987). Protection of public water supplies from ground-water contamination / edited by Wayne A. Pettyjohn. Noyes Data Corp.
Chicago Style (17th ed.) CitationCenter for Environmental Research Information (U.S.), United States. Environmental Protection Agency. Office of Drinking Water, and Wayne A. Pettyjohn. Protection of Public Water Supplies from Ground-water Contamination / Edited by Wayne A. Pettyjohn. Park Ridge, N.J., U.S.A.: Noyes Data Corp, 1987.
MLA (9th ed.) CitationCenter for Environmental Research Information (U.S.), et al. Protection of Public Water Supplies from Ground-water Contamination / Edited by Wayne A. Pettyjohn. Noyes Data Corp, 1987.